641893693 has 8 divisors (see below), whose sum is σ = 733839680. Its totient is φ = 550009440.

The previous prime is 641893691. The next prime is 641893699. The reversal of 641893693 is 396398146.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 641893693 - 2¹ = 641893691 is a prime.

It is a super-2 number, since 2×641893693² = 824055026226356498, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641893691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9553 + ... + 37081.

It is an arithmetic number, because the mean of its divisors is an integer number (91729960).

Almost surely, 2^641893693 is an apocalyptic number.

It is an amenable number.

641893693 is a deficient number, since it is larger than the sum of its proper divisors (91945987).

641893693 is a wasteful number, since it uses less digits than its factorization.

641893693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30867.

The product of its digits is 839808, while the sum is 49.

The square root of 641893693 is about 25335.6210304780. The cubic root of 641893693 is about 862.6230052951.

The spelling of 641893693 in words is "six hundred forty-one million, eight hundred ninety-three thousand, six hundred ninety-three".